| Acronym | Definition |
|---|
| ISRR➣International Soundex Reunion Registry |
| ISRR➣International Symposium on Robotics Research |
| ISRR➣Indiana Southern Railroad |
| ISRR➣Internal System Requirements Review |
| ISRR➣Intelligence, Surveillance, and Reconnaissance Requirement (military technology) |
| ISRR➣Index of Search and Reunion Resources |